package com.strategy;

public abstract class Duck {

    public Duck() {

    }

    public abstract void display(); //显示鸭子信息

    public void quack() {
        System.out.println("鸭子嘎嘎叫～～");
    }

    public void swim() {
        System.out.println("鸭子会游泳～～");
    }

    public void fly() {
        System.out.println("鸭子会飞翔～～～");
    }
}
